Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2d053d411f5bd6…

MALICIOUS

PDF

82.9 KB Created: 2021-08-06 17:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 0bf63e16d7610c9fddcb0127413be264 SHA-1: b4f8e8c501db55447d6e572c12979b3f2859cea8 SHA-256: df2d053d411f5bd618a9d7d0504220fc306e1314dfe7435b17008c05e4433487
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document's purpose is to trick the user into providing a password for an archive, likely to bypass gateway security and deliver a payload. Numerous URLs were extracted, many pointing to compromised CMS uploads or disposable hosting, which are common for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pistant.ru/uplcv?utm_term=livro+metodologia+cientifica+marconi+e+lakatos+pdf PDF link annotation
    • http://domeinbeverdonk.be/assets/files/file/49162232128.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/9266687611.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f0db66463---xagikoverusujibepumi.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/ml6kdsr3r94jo7n0fg4s3v7630/12439056163.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071bb50751ab---koriturebupareninizewozil.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/35793190582.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160f8a8bebf664---89766675710.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/94548049032.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/9e63e1cec483275e87aaa20727e217ff/34055281458.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/buwezogigefudi.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/c661fd5e29368e8f5c7d5dd2c00d9a84/zakopipemaf.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f66d9cb4a4---17135555154.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722fb4ea5fe---12247183924.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/xelozerifegu.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/30983992716.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/dupuwutozesuvodirinanawug.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/4d5u6aki3q9tb1v5k5nao2ps9o/sovisuxos.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/raparugidogev.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/qot1iemb4ckgoq65qtaj7qvmvj/wogujixufaxobawinan.pdfIn PDF document text
    • http://canvangdientu.com/images/file/38091397400.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/sezedogapopimivuwasoj.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0524c1d2d---jefekopew.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/korefovatotixi.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/59242389177.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 11080 bytes
SHA-256: 6e75e8545d80e3459798243878ad8baaa2695057aa1a0ff3aeda7c7d634891ef
font_02_sfnt_off00010b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5C 19668 bytes
SHA-256: 9e851c2a10373eb0d9da28478d00805d925c4c36a2fc4b2b0f7a3609210a98cd

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